/*
 * Copyright 2010 Askar Kalykov, oxygene.core@gmail.com
 *
 *    Licensed under the Apache License, Version 2.0 (the "License");
 *    you may not use this file except in compliance with the License.
 *    You may obtain a copy of the License at
 *
 *        http://www.apache.org/licenses/LICENSE-2.0
 *
 *    Unless required by applicable law or agreed to in writing, software
 *    distributed under the License is distributed on an "AS IS" BASIS,
 *    WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *    See the License for the specific language governing permissions and
 *    limitations under the License.
 */

package com.oxygenecore.processor;

import com.oxygenecore.processor.Statement;
import com.oxygenecore.processor.Stream;
import com.oxygenecore.processor.StreamException;

import java.util.Iterator;
import java.util.NoSuchElementException;

/**
 * @author Askar Kalykov
 *         Date: 11.09.2010
 *         Time: 0:01:21
 */
public class IteratorStatementStream implements Stream<Statement> {
    private Iterator<? extends Statement> iterator;


    public IteratorStatementStream(Iterator<? extends Statement> iterator) {
        if (iterator == null) {
            throw new NullPointerException("collection");
        }
        this.iterator = iterator;
    }

    public boolean hasNext() {
        return iterator.hasNext();

    }

    public Statement getNext() throws StreamException {
        try{
            return iterator.next();
        } catch (NoSuchElementException e){
            throw new EndOfStreamException(e);
        }
    }

    /**
     * Does nothing
     */
    public void close() { }
}
